Foldable briefcase



FIG. 1 is a perspective view of a foldable briefcase showing my new design in the folded mode;

FIG. 2 is a front elevational view of the briefcase in the folded mode;

FIG. 3 is a bottom plan view of the briefcase in the folded mode;

FIG. 4 is a rear elevational view of the briefcase in the folded mode;

FIG. 5 is an elevational view of the opposite end of the briefcase in the folded mode;

FIG. 6 is a perspective view of the briefcase in a partially unfolded mode;

FIG. 7 is a perspective view of the briefcase in an unfolded mode;

FIG. 8 is a rear elevational view of the briefcase in the unfolded mode;

FIG. 9 is a perspective view of the briefcase in a fully open mode. 

The ornamental design for a folding briefcase, as shown and described. 